Chemical interactions between zirconium and free oxide in molten fluorides
Chemical interactions between zirconium and free oxide in molten fluorides
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熔融氟化物中锆和游离氧化物之间的化学相互作用
DOI：
10.1039/c5ra04188k
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发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Xie, Leidong
中科院分区：
文献类型：
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作者：
Shen, Miao;Peng, Hao;Xie, Leidong
采用碳热还原技术（LECO氧化物分析仪）和拉曼光谱研究了不同锆氧化物（nZr/nO）摩尔比下的FLiNaK熔体中锆与游离氧化物的化学相互作用。当nZr/nO≤0.5时，ZrO2沉淀形成，当nZr/nO > 0.5时，ZrO2转化为Zr2OFx6−x配合物。Zr2OFx6−x配合物在FLiNaK熔体中的最大含量为0.020 mol kg−1。在初始氧化浓度低于0.020 mol kg−1和ZrF4用量的条件下，FLiNaK熔体中的游离氧化物可以完全转化为Zr2OFx6−x配合物，进一步防止了UO2析出物的形成。
The chemical interactions between zirconium and free oxide in FLiNaK melts at different zirconium to oxide (nZr/nO) molar ratios were studied by means of a carbothermal-reduction technique (LECO oxide analyzer) and Raman spectroscopy. ZrO2 precipitates were formed with nZr/nO ≤ 0.5, while ZrO2 was converted to Zr2OFx6−x complexes with nZr/nO > 0.5. The maximum amount of Zr2OFx6−x complexes in FLiNaK melts was found to be 0.020 mol kg−1. With an initial oxide concentration lower than 0.020 mol kg−1 and the required amount of ZrF4, the free oxide in FLiNaK melts could be completely converted to Zr2OFx6−x complexes, which would further prevent the formation of UO2 precipitates.